Manley 1.311 Nextek Dual Valve Springs 221431-16

Manley 1.500 Nextek Dual Valve Springs 221456-16Valve Spring - NexTek - Dual Spring - 800 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16

Manley 1.500 Nextek Dual Valve Springs 221420-16Valve Spring - NexTek - Dual Spring - 780 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16

Manley 1.530 Nextek Dual Valve Springs 221432-16Valve Spring - NexTek - Dual Spring / Damper - 435 lb/in Spring Rate - 1.170 in Coil Bind - 1.530 in OD - Set of 16

Manley 1.500 Nextek Dual Valve Springs 221455-16Valve Spring - NexTek - Dual Spring - 797 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16